%0 Journal Article %1 AENM:AENM201502472 %A Abdi-Jalebi, Mojtaba %A Dar, M. Ibrahim %A Sadhanala, Aditya %A Senanayak, Satyaprasad P. %A Franckevičius, Marius %A Arora, Neha %A Hu, Yuanyuan %A Nazeeruddin, Mohammad Khaja %A Zakeeruddin, Shaik M. %A Grätzel, Michael %A Friend, Richard H. %D 2016 %J Advanced Energy Materials %K perovskite processing %N 10 %P n/a--n/a %R 10.1002/aenm.201502472 %T Impact of Monovalent Cation Halide Additives on the Structural and Optoelectronic Properties of CH3NH3PbI3 Perovskite %U http://dx.doi.org/10.1002/aenm.201502472 %V 6 %X The influence of monovalent cation halide additives on the optical, excitonic, and electrical properties of CH3NH3PbI3 perovskite is reported. Monovalent cation halide with similar ionic radii to Pb2+, including Cu+, Na+, and Ag+, have been added to explore the possibility of doping. Significant reduction of sub-bandgap optical absorption and lower energetic disorder along with a shift in the Fermi level of the perovskite in the presence of these cations has been observed. The bulk hole mobility of the additive-based perovskites as estimated using the space charge limited current method exhibits an increase of up to an order of magnitude compared to the pristine perovskites with a significant decrease in the activation energy. Consequentially, enhancement in the photovoltaic parameters of additive-based solar cells is achieved. An increase in open circuit voltage for AgI (≈1.02 vs 0.95 V for the pristine) and photocurrent density for NaI- and CuBr-based solar cells (≈23 vs 21 mA cm−2 for the pristine) has been observed. This enhanced photovoltaic performance can be attributed to the formation of uniform and continuous perovskite film, better conversion, and loading of perovskite, as well as the enhancement in the bulk charge transport along with a minimization of disorder, pointing towards possible surface passivation.

@article{AENM:AENM201502472, abstract = {The influence of monovalent cation halide additives on the optical, excitonic, and electrical properties of CH3NH3PbI3 perovskite is reported. Monovalent cation halide with similar ionic radii to Pb2+, including Cu+, Na+, and Ag+, have been added to explore the possibility of doping. Significant reduction of sub-bandgap optical absorption and lower energetic disorder along with a shift in the Fermi level of the perovskite in the presence of these cations has been observed. The bulk hole mobility of the additive-based perovskites as estimated using the space charge limited current method exhibits an increase of up to an order of magnitude compared to the pristine perovskites with a significant decrease in the activation energy. Consequentially, enhancement in the photovoltaic parameters of additive-based solar cells is achieved. An increase in open circuit voltage for AgI (≈1.02 vs 0.95 V for the pristine) and photocurrent density for NaI- and CuBr-based solar cells (≈23 vs 21 mA cm−2 for the pristine) has been observed. This enhanced photovoltaic performance can be attributed to the formation of uniform and continuous perovskite film, better conversion, and loading of perovskite, as well as the enhancement in the bulk charge transport along with a minimization of disorder, pointing towards possible surface passivation.}, added-at = {2016-08-19T10:12:14.000+0200}, author = {Abdi-Jalebi, Mojtaba and Dar, M. Ibrahim and Sadhanala, Aditya and Senanayak, Satyaprasad P. and Franckevičius, Marius and Arora, Neha and Hu, Yuanyuan and Nazeeruddin, Mohammad Khaja and Zakeeruddin, Shaik M. and Grätzel, Michael and Friend, Richard H.}, biburl = {https://www.bibsonomy.org/bibtex/206efbc029d6346be3a08df07da64b770/bretschneider_m}, description = {Impact of Monovalent Cation Halide Additives on the Structural and Optoelectronic Properties of CH3NH3PbI3 Perovskite - Abdi-Jalebi - 2016 - Advanced Energy Materials - Wiley Online Library}, doi = {10.1002/aenm.201502472}, interhash = {c545d38c97484b7fb2241ae60f936b1e}, intrahash = {06efbc029d6346be3a08df07da64b770}, issn = {1614-6840}, journal = {Advanced Energy Materials}, keywords = {perovskite processing}, number = 10, pages = {n/a--n/a}, timestamp = {2016-08-19T10:12:14.000+0200}, title = {Impact of Monovalent Cation Halide Additives on the Structural and Optoelectronic Properties of CH3NH3PbI3 Perovskite}, url = {http://dx.doi.org/10.1002/aenm.201502472}, volume = 6, year = 2016 }